Malicious PDF — malware analysis report

Static analysis result for SHA-256 684fe3268c30b4f1…

MALICIOUS

PDF

62.2 KB Created: 2021-01-20 12:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 53d45b29b9d3755657bfaf8b4722dc78 SHA-1: d95f30aebb7417506f0553fc4341dbc0a7764046 SHA-256: 684fe3268c30b4f1babdbcb6afd9d7b2df17d0f4edcee0a8b9dd4e08a64eb73c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jottigo.ru/123?utm_term=speed+engineering+headers+ls1 PDF link annotation
    • https://site-1171371.mozfiles.com/files/1171371/taps_to_riches_apk_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/vavegewumur/qPULhcQ/xutifivipomepodubi.pdfIn PDF document text
    • https://cdn.sqhk.co/fatidizeru/Yrgdl0C/milirazizaxugedefivow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/76670373735.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/lesson_plan_template_elementary_common_core.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/baixar_yowhatsapp_7._99_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/45428524690.pdfIn PDF document text
    • http://jajowisomipuw.epizy.com/behringer_ecm8000_calibration_file.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/79311240437.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/facebook_ad_format_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/family_worksheet_1st_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/4013089011.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/pneumonia_guidelines_pediatric.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB771 5376 bytes
SHA-256: d2d71e5ddb4c62cdf4c940eb03ebca2ca17ce366c374ea19169eab1985aae111
font_01_sfnt_off0000c9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B0 10060 bytes
SHA-256: 5f9d3aafabba5726baff37534c37713d122ef8d398302601a3550b5414e4b3f9

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